Nope, Cornish X not Coturnix. They do seem very easy to process though. Imagine the skin comes right off like partridge. Chicken skinning is not that easy.
I like to use an exacto knife. Super sharp, not so long of blade to get in the way or cut yourself and quick blade change out when it does get dull. Cutting joints is more of a backward break so you only need to scour a ring around, bend joint backward to pop open then cut the tendons. Easy to do with a short blade like exacto knife.
Some grills have a side burner or even get hot enough on grill to heat the water. If yours doesn't then absolutely get a turkey fryer. I've done the heating water in kitchen to run back and forth adding boiling water to bring up temp after each bird and have to say, it's slow and gets old quick. People determined to go without a propane heat source have fair luck putting the hot water in a cooler for insulation. 155-160F is what you need, too hot and you burn the skin, too cold and the feathers won't be ready to pluck. Dunk, swish, take out and repeat. Keep dunking and swishing/plunging the bird until the feathers are ready. It's like wallpaper removal. Don't even start until it's ready to come off with ease or you'll be wasting time, energy and damaging the subsurface which in the birds case tearing it's skin. Can take 5 or more plunges. When the large tail or wing feathers release with the slightest effort is when it's ready then you can pluck the bird by handfuls at a time and have one clean in less than 5 minutes easy.
Tools I use:
Block of wood and hatchet- I'm old school. People really like the cone method though.
stock pot with heat source for scalding.
Cutting board and exacto knife.
large trash can with liner duct taped around it. Pain if it keeps falling in.
garden hose attached to water source. Clean table and final clean of birds.
Coolers with ice water to store birds.
Doing that many birds at once you may want shrink wrap bags too. When all done you put bird in bag, tie it then poke a hole to let air out prior to dunking in clean hot water to shrink seal the bag to bird. Put label over the hole you make. Very slick way to freezer ready the birds.
The fruitful harvest wish still applies though. Good luck.
